/*
GanttProject is an opensource project management tool.
Copyright (C) 2005-2011 GanttProject Team

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 3
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/
package net.sourceforge.ganttproject.action;

import java.awt.event.ActionEvent;
import java.text.MessageFormat;

import net.sourceforge.ganttproject.gui.NotificationChannel;
import net.sourceforge.ganttproject.gui.NotificationItem;
import net.sourceforge.ganttproject.gui.NotificationManager;

public class ShowChannelAction extends GPAction implements NotificationChannel.Listener {
    private final NotificationChannel myChannel;
    private final NotificationManager myManager;

    public ShowChannelAction(NotificationManager manager, NotificationChannel channel) {
        super("notification.channel." + channel.toString().toLowerCase() + ".label");
        myChannel = channel;
        myManager = manager;
        myChannel.addListener(this);
        updateState();
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        myManager.showNotification(myChannel);
    }

    @Override
    protected String getLocalizedName() {
        int unreadCount = myChannel == null ? 0 : myChannel.getUnreadCount();
        String channelName = super.getLocalizedName();
        return unreadCount == 0
            ? channelName
            : MessageFormat.format(getI18n("notification.channel.unreadformat"), channelName, unreadCount);
    }

    private void updateState() {
        if (myChannel.isEmpty() && myChannel.getDefaultNotification() == null) {
            setEnabled(false);
        } else {
            setEnabled(true);
        }
        updateName();
    }

    @Override
    public void notificationAdded() {
        updateState();
    }

    @Override
    public void notificationRead(NotificationItem item) {
        updateState();
    }

    @Override
    public void channelCleared() {
        updateState();
    }
}
